On the Origin of Time

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A groundbreaking theory of the universe, developed over two decades by Stephen Hawking and Thomas Hertog, explores the profound question of how conditions for life emerged in the cosmos. Hawking's renowned Big Bang theory faced challenges when it suggested a multiverse filled with numerous, often inhospitable, universes. In the physics department at Cambridge, Hawking and Hertog dedicated years to formulating a new understanding of the cosmos. Their research revealed that, as they approached the Big Bang, the laws of physics seemed to evolve, simplifying to the point where particles, forces, and even time appeared to dissolve. This led to a transformative idea: the laws of physics are not immutable but change as the universe itself develops. The narrative chronicles a deep friendship rooted in the pursuit of answers to questions that extend beyond our universe, delving into the extreme physics of black holes and integrating insights from string theory. As Hawking's life drew to a close, the duo published a final paper proposing a revolutionary perspective on the universe's origins, reshaping our understanding of humanity's place within it. This book encapsulates the legacy of their remarkable journey.